Boiler



April 14,1936.

C. OHARA BOILER flllll c. G. QOHARA BOILER Filed July 21, 1954 April 14, 1936. 2,037,665

. 3 Sheets-Sheet 2 //W/vr0/a CHABLES 6. OWA'EA,

I C. G. OHARA April 14,1936.

' BOILER Filed July 21, 1954 3 Sheets-Sheet 5 CHARLES 6. O'Hnen,

Patented Apr. 14, 1936 UNITE D STATES PATENT OFFICE Norristown Foundry Company, -Inc., Norristown, Pa., a corporation of Pennsylvania Application July 21, 1934, Serial No; 736,301

10 Claims.

It is the object and effect of my invention-to provide an outer integral casing, comprising a combustion chamber, an ash pit at the bottom ofsaid combustion chamber, and a coal bin laterally adjoining said combustion chamber; with two water containers in said combustion chamher having respective water inlets and outlets extending to the exterior of said casing; one container being included in a substantially closed circuit for supplying hot water or steam to radiators, and the other container being included in the water supply system to furnish hot water through taps; asingle burner bowl being mounted in said combustion chamber below said water containers and in heating relation with both of them; a stoker casing cooperatively connecting said-coal bin with-said burner bowl; stoker mechanism in said stoker casing'including a coal conveyer in cooperative relation with said burner O bowl; an electric motor in said furnace casing exterior to said stokercasing and below said bin; an air blower in said furnace casing below said binlhaying an air inlet from the atmosphere and an air outlet to said stoker casing; and'including a rotor directly connected with the armature of said motor; and adjustable means operatively connecting said motor withsaid coal conveyer for varying the rate of operation of said coal conveyer with reference to the rate of operation of saidmotor;"whereby combustion of fuel' from said burnerv bowl is facilitated by a forced draft, butthe temperature of the water in said containers maybe controlled and regulated by adjustmentof saidmeans connecting said motor with said coal conveyer.

My invention "includes the various novel fea tures of construction and arrangement hereinafter more definitely specified, and particularly the 'inclusion'in' the water containers of several substantially rectangular partitions arranged to bafile the products of combustion in their passage through said combustion chamber to a-fiue outlet; said partitions being inclined so that ash dust will gravitate therefrom; baffle plates which are pivotally supported in said casing and providedwith connecting means normally holding them in cooperative relation with certain of said partitions to direct the draft with respect to the latter and catch ash dust; said baffle plates being movable, together, by said connecting means, to open the air passages which they normallyobstruct and dump the ash dust therefrom.

Inisaid drawings Fig. I is a front elevation of a unitary-structure conveniently embodying l my invention.

Fig. II is an elevation of the right hand end of said structure, as shown in Fig. I.

'Fig. III is a vertical sectional view of said structure taken centrally with respect to the burner and combustion chamber in Fig. I and looking to the left in that figure.

In said figures: the entire combination is held in the outer casing I. Said casing I has the metal lining I with heat insulating material I" between them. The inner shell 2 forms the combustion chamber 3 having the flue outlet 4 at the top thereof and the ash pit 5 at the bottom thereof. Said casing I holds the coal bin 6 laterally adjoining said combustion chamber. The rectangular main water space I is cross connected by the series of substantially rectangular hollow partitions 8 in said combustion chamber arranged in parallel planes so inclined as to baffle the products of combustion on their way to said flue 4, and with their opposite ends welded to said shell 2 in registry with openings in the latter. Said water space I has the water inlet 9 and the water outlet I0 extending to the exterior of said casing for supplying with hot water or steam heat exchanging devices such as radiators I0 remote from said furnace.

The smaller water container I I in said combustion chamber has the water inlet IZand the water outlet I3 extending to the exterior of the casing and for inclusion in the Water supply system to furnish hot water through taps I3. Said container II is preferably mounted below the container I so as to be subjected to a greater degree of heat from the burner bowl I4 which is the heating means common to both containers and in which coal of extremely small sizes may be burnt by a forced draft of air through perforations I4 in the sides of said bowl, supplied as hereinafter described.

The stoker casing I5 and the coal conveyer tube I6 cooperatively connect said coal bin 6 with said burner bowl I4. Stoker mechanism in said stoker casing includes the reciprocatory coal conveyer bar I'I having a longitudinal series of wedgeshaped abutments IT for engaging the coal from said bin 6 and feeding it toward said burner bowl I4. The electric motor I8 in said furnace casing 2 exterior to said stoker casing I5 and below said bin 6 is arranged to operate both said coal conveyer I1 and the air blower 20. cludes a rotor directly connected with the armature shaft 2| of said motor I8 mounted within the casing 22 and having an inlet 23 from the atmosphere and an outlet 24 to said stoker casing I5. Said motor thus creates a forced draft from The latter inr the lower portion of said casing 2 to said flue 4 through said burner bowl M.

The opposite end of said armature shaft 2| carries the worm 25 engaging the worm gear 21 on the countershaft 28 which is journaled in the casing 29 inclosing said worm and gear. Said countershaft 28 has, at the right hand end thereof shown in Fig. II, the crank disk 36 carrying the crank 3|. Said crank 3| is pivotally connected with the outer end of the rod 32, the opposite end of which is pivotally connected, at 33, with the yoke 34 which is mounted to reciprocate upon the two cylindrical studs 35 which extend in parallel relation from the right hand and of said stoker casing |5, as shown in Fig. I. Said yoke 34 has the bearing 36 in sliding engagement with the reduced and cylindrical outer end 31 of said reciprocatory coal conveyer I! so that when said yoke is thrust to the left in Fig. I said bearing 36 comes in contact with the shoulder 38 on said conveyer bar so as to thrust the latter to the left in the stoker casing l and feed the coal from the coal bin 6 through said coal conveyer tube |6 to the burner bowl I4.

I provide adjustably variable means operatively connecting said motor IS with said coal conveyer bar II for varying the rate of feed of coal with reference to the rate of operation of said motor so that the temperature of the water in said containers may be controlled and regulated by adjustment of said means. Such means conveniently include the abutment sleeve 46 and washers 4| which are mounted upon said reduced cylindrical end 31 of the coal conveyer bar H, as shown in Fig. I, and retained thereon by the nut 42 which is screw threaded upon the end of said bar H and secured by the cotter pin 43. Of course, the axial position of said sleeve 40 on said conveyer bar is variably determinable by the number and axial thickness of the washers 4| interposed between the right hand face of said yoke bearing 38 and the left hand face of said sleeve 40 so that although the reciprocatory motion of said yoke and its bearing 38 remains constant, the effective stroke which it imparts to said conveyer bar I1 is variable to vary the amount of coal conveyed from the coal bin 6 to said burner bowl M in a given time.

As above noted, said hollow partitions 8 which connect the opposite sides of the main water space 1, through the combustion chamber 3, and the smaller water container H in said combustion chamber 3, are inclined, as indicated in Fig. II, so that ash dust will gravitate therefrom. However, in order to direct the draft with respect to said partitions so that it will follow the direction indicated by the arrows in Fig. II and thus afford maximum opportunity for the exchange of heat from the products of combustion of the fuel in said burner bowl M to the water in said containers, I find it necessary to provide the baffle plates 45 and 46 which are respectively hinged at 41 and 48 in the wrought metal angle brackets 50 and 5| which are rigidly but detachably secured to said lining by the bolts 52 and 53 indicated in Fig. I. Said baffieplates 45 and 46 are connected by the rod 54 which is pivotally connected thereto respectively at 55 and 56, as indicated in Fig. II. The lower end of said rod 54 is pivotally connected at 58 to the crank shaft 59 which extends through said outer casing members and in which it is journaled, and car ries at its outer end the lever 60 having the weighted end 6| so proportioned that it normally upholds said bafile plates 45 and 46. in the position shown in Fig. II respectively against the water container and one of the partitions 8.

It is to be understood that the construction and arrangement last above described are such that at the will of the operator said weighted lever 66 may be uptilted to swing down the baffie plates 45 and 46 together to open the air passageways 63 and 64 which they normally obstruct, and dump the ash dust therefrom into the ash pit 5 at the bottom of the furnace casing. Referring to Fig. I, it may be observed that the stoker casing I5 is also provided with the ash dust outlet 65 beneath the burner bowl |4 through which ashes may gravitate into said pit 5 and, of course, the ashes formed by the combustion of the fuel which find their way above the bowl |4 gravitate over the edge of the top flange of said bowl into said pit. Therefore, I find it convenient to provide said ash pit 5 with the door 66 which is hinged at 61 to said outer casing member and provided with the latch 68 by which it may be normally held shut. However, said door 65 may be unlatched and raised and the ashes manually removed from said pit 5 at the convenience of the operator.

Said combustion chamber 3 has the rectangular doorway at the bottom thereof provided with the door H which is hinged at 12 and provided with the spring 13 by which it is normally held shut with the latch 74 engaging the keeper 15. The coal bin 6 is also conveniently provided with the cover 7! which is hinged at 18 so that it may be upturned in connection with said casing to charge said bin with fuel. However, it is normally closed as shown in the drawings. I find it convenient to provide said main water container 1 with the pressure gage 80 connected therewith by the pipe 8| and also to provide said container with the water gage 82 connected therewith by the pipes 83 and 84.

Although I have found it convenient to dispose said main water container in upright position; it may be inclined or placed in horizontal position, provided that it is so located that the products of combustion from the burner bowl I4 are directed through the combustion chamber within said water container to the fiue at the opposite end thereof.

Therefore, I do not desire to limit myself to the precise details of construction and arrangement herein set forth, as it is obvious that various modifications may be made therein without departing from the essential features of my invention, as defined in the appended claims.

I claim:

1. In a boiler furnace, the combination with an outer integral casing, of an inner casing in spaced relation with said outer casing, forming a water container, and comprising a combustion chamber, and an ash pit at the bottom of said combustion chamber; a burner at the lower portion of said combustion chamber; a flue at the upper portion of said combustion chamber; a substantially rectangular hollow partition extending transversely in said combustion chamber and inclined with respect to the axis of said chamber, the hollow of said partition being in communication with said water container, and said partition forming a baflie for the products of combustion from said burner on their way to said flue; said partition being so inclined that ash dust will gravitate down the upper surfaces thereof; a baffle plate pivotally mounted at the lower end of said partition, for normally obstructing the air passage between said partition and the wall of said combustion chamber andsupporting ash dust'which gravitates-thereon; means for operating said baffle plate including arod pivoted to said plate; means for tilting said baffle plate for temporarily opening said air; passage and dumping ash dust therefrom, including a crank shaft having a crank connected with said rod; and means for holding saidbaflle plate normally shut, including a weighted lever on said crank shaft. 7

2. In a boiler furnace, the combination with anouter integral casing,'of an' inner casing in spaced relation with said outer casing, forming a water container, and comprising a combustion chamber, and an ash pit at the bottom of said combustion chamber; of a burner, at the -lower portion of said combustion chamber; a'fiue at the upper portion of said combustion chamber; a substantially rectangular hollow partition extending transversely in said combustion chamber and inclined with respect to the axis of said chamber, the hollow of said partition being in communication with said water container, and said partition forming a baflle for the products of combustion from said burner on their way to said flue; another hollow partition forming a second water container distinct and separate; from said first container; said partitions being so inclined that ash dust will gravitate down the upper surfaces thereof; baflle plates respectively pivotally mounted at the lower ends of said partitionsdor normally obstructing the air passages between said partitions and the wall of said combustion chamber and supporting ash dust which gravitates thereon; means for operating "said bafiie plates together, including a single red pivoted to each plate; and means for tilting said bafile plates for temporarily opening said air passages and dumping ash dust therefrom, including a crank shaft having a crank connected with said rod; and means for holding said-baffle plates normally shut, including a weighted lever on said crankshaft.

3. In a boiler furnace, the combination with an outer integral casing, of an inner-casing in spaced relation with said outer casing, forming "all a water containenand' comprising a combustion chamber, and an ash pit at the bottom of said combustion chamber; a burner at the lower portion of said combustion chamber; a flue at the upper portion of said combustion chamber; a substantially rectangular hollow partition extending transversely in said combustion chamber and inclined with respect to the axis of said chamber, the hollow of said partition being in communication with said water container, and said partition forming a bafile for the products of combustion from said burner on their way to said flue; said partition being so inclined that ash dust will gravitate down the upper surfaces thereof; a baffle plate pivotally mounted at the lower end of said partition, for normally obstructing the air passage between said partition and the wall of said combustion chamber and normally supporting ash dust which gravitates thereon; means for operating said baflle plate to dump ash dust therefrom, into said pit, including a rod pivoted to said plate; and means for holding said baflle plate normally shut.

In a boiler furnace, the combination with an outer integral casing, of an inner casing in spaced relation with said outer casing, forming a water container, and comprising a combustion chamber, and an ash pit at the bottom of said combustion chamber; of a burner at the lower portion of said combustion chamber; a flue at the upper portion of said combustion chamber; a substantially rectangularhollow partition extending transversely in said combustion chamber and inclined with respect to the axis of said chamber, the hollow of said partition being in communication with said water container and said partition forming a baflie' for the products of combustion from said burner on their way to said flue; another hollow partition forming a second water container distinct and separate from said first'container; said partitions being so -inclined that ash'dust will gravitate down the upper'surfaces thereof; baflle plates respectively pivotally mounted at the lower ends of said partitions for normally obstructing the air passages between said partitions and the wall of said combustion chamber and normally supporting ash dust which gravitates thereon; means for operating said baflle plates together, to dump ash dust intosaid pit, including a rod pivoted to each plate; and means for holding said baffle plates normally shut.

5. In a boiler furnace, the combination with awatercontainer comprising two casings, one within the other, with a water space between them; the inner casing comprising a combustion chamber; of aburner atone end of said combustion chamber; a flue at the other end of said combustion chamber; a substantially rectangular of saidpartition being in communication with said water space at each end of said partitionand said-partition forming a baffie for the-products of combustion from said burner on their way to said flue; said partition being so inclined that ashdust will gravitate down the upper surface thereof; a bailleplatepivotally mounted at the lower end of-said partition for normally obstructing the air passage between said partition and the wall of said combustion chamber and normally supporting ash dust which gravitates thereon; means for normally holding said bafile plate shutpand means for operating said baffle plate to dump ash dust therefrom.

6. In a boiler furnace, the combination with a water container comprising two casings, one within the other, with a water space between them; the inner casing comprising a combustion chamber; of a burner at one end of said combustion chamber; a flue at the other end of said combustion chamber; a plurality of substantially rectangular hollow partitions extending transversely in said combustion chamber and inclined with respect to the direction of travel of the products of combustion from said burner to said flue; the hollow of said partitions being in communication with said water space at each end of each partition, and said partitions forming bafiles for the products of combustion from said burner on their way to said flue; said partitions being so inclined that ash dust will gravitate down the upper surfaces thereof; baffle plates respectively pivotally mounted at the lower ends of said partitions for normally obstructing the air passages between said partitions and the wall of said combustion chamber and normally supporting ash dust which gravitates thereon; means for normally holding said baffle plates shut; and means for operating said bafile plates together, to dump ash dust therefrom.

'7. A structure as in claim 5, including another hollow partition forming a second water container distinct and separate from said first container; said second partition being so inclined that ash dust will gravitate down the upper surface thereof; a baffle plate pivotally mounted at the lower end of said second partition; and means for operating said bafile plates together, to dump ash dust therefrom. I

8. In a boiler furnace, the combination with cylindrical concentric outer and inner casings in integral relation, spaced to form a water container between them and comprising a combustion chamber within said inner casing and an ash pit at the bottom of said combustion chamber; of a burner at the lower portion of said combustion chamber; a flue at the upper portion of said combustion chamber; a substantially rectangular hollow partition extending transversely in said combustion chamber, the hollow of said partition being in communication with said water container, and said partition forming a bafile for the products of combustion from said burner on their way to said flue; another hollow partition forming a second water container, distinct and separate from said first container, said second partition forming a bafile for the products of combustion from said burner on their way to said first partition and said flue; both of said partitions being so inclined with respect to the axis of said chamber that ash dust will gravitate down the upper surfaces thereof; and bafiie means carried by said second partition at the lower end thereof adapted to receive and temporarily support the ashes from both partitions; and means whereby said bafiie means may be moved to dump ash dust therefrom into said pit.

9. In a boiler furnace, the combination with cylindrical concentric outer and inner casings in integral relation, spaced to form a water container between them and comprising a combustion chamber within said inner casing and an ash pit at the bottom of said combustion chamber; of a burner at the lower portion of said combustion chamber; a flue at the upper portion of said combustion chamber; a substantially rectangular hollow partition extending transversely in said combustion chamber, the hollow of said partition being in communication with said water container, and said partition forming a baffle for the products of combustion from said burner on their way to said flue; another hollow partition forming a second water container, distinct and separate from said first container, said second partition forming a baffie for the products of combustion from said burner on their way to said first partition and said flue; both of said partitions being so inclined with respect to the axis of said chamber that ash dust will gravitate down the upper surfaces thereof; said partitions being in the same inclined plane and immediately adjoining each other; whereby ash dust gravitating down said first partition passes over said second partition on its way to said pit.

10. In a boiler furnace, the combination with cylindrical concentric outer and inner casings in integral relation, spaced to form a water container between them and comprising a combustion chamber within said inner casing and an ash pit at the bottom of said combustion chamber; of a burner at the lower portion of said combustion chamber; a flue at the upper portion of said combustion chamber; a substantially rectangular hollow partition extending transversely in said combustion chamber, the hollow of said partition being in communication with said water container, and said partition forming a baflle for the products of combustion from said burner on their way to said flue; another hollow partition forming a second water container, distinct and separate from said first container, said second partition forming a bafile for the products of combustion from said burner on their way to said first partition and said flue; both of said partitions being so inclined with respect to the axis of said chamber that ash dust will gravitate down the upper surfaces thereof; said partitions being in the same inclined plane and immediately adjoining each other; whereby ash dust gravitating down said first partition passes over said second partition on its way to said pit; and movable ash dumping means carried by said second partition for temporarily detaining said ashes on their way to said pit.

CHARLES G. OHARA. 

